Link to original post : Puzzle 53: Slitherlink außen-knapp-daneben

Here’s a practice puzzle for the other non-standard type on the Serbian GP this weekend, “Slitherlink Out-Liars” as they call it. I’m not too sure this one is representative of the type; certainly it feels different than the others I’ve solved. Rules Draw a single loop that doesn’t touch or cross itself by connecting dots horizontally and vertically. […]


Posted in Puzzles, außen-knapp-daneben, hard, practice, slitherlink, variant

Link to original post : Puzzle 54: Lakes

The next GP round is coming up the weekend after next; this time it’s Slovakia’s turn. I’m very much looking forward fo this, after a great first round by Serbia. In that contest, I was particularly impressed by the Fillominos, which didn’t seem like they should turn out unique. It’s a bit early to judge […]


Posted in Puzzles, lakes, medium, practice

Link to original post : Puzzle 55: Slovak Sums

Here’s another GP preview puzzle. It’s a bit degenerate, but maybe it’s still useful? For this type, there’s a bit more material out there: in the Mixed Bag round of the UK Open 2013 in Matej Uher’s contribution to last year’s 24h puzzle championship a masterpiece by @pronter on twitter Rules Place digits from 1 […]


Posted in Puzzles, easy, preview, slovak sums

Link to original post : Puzzle 56: Slovak Sums

Some more Slovak Sums, see the previous one for the rules. This one is certainly more difficult.


Posted in Puzzles, hard, practice, slovak sums

Link to original post : Puzzle 57: Lakes

One more Lakes puzzle. Enjoy!


Posted in Puzzles, hard, lakes, practice

Link to original post : Puzzle 58: Doubleback

The online qualification tournament for this year’s German Logic Masters is taking place next weekend, authored by Silke Berendes and me. It’s open as a contest to everybody. Let us know on the forum if anything’s unclear in the instruction booklet (the English version hasn’t been proof-read extensively). Here’s a Double Back puzzle that didn’t make the […]


Posted in Puzzles, double back, hard

Link to original post : Puzzle 59: Checkered Fillomino

The German qualification is through. The puzzles will be available there again sooner or later, maybe I’ll post my contribution to the set here later. Here’s a somewhat trickier Checkered Fillomino that didn’t make it. Not sure it’s right to tag it as hard, depends a lot on how well you know the type.


Posted in Puzzles, checkered fillomino, fillomino, hard, variant

Link to original post : Puzzle 60: Checkered Fillomino

I hope you enjoy these Checkered Fillominos as much as I do. This one came out clearly too hard for this year’s 24h puzzle championship in Budapest. (April 17-19, I don’t think it’s too late to join.)


Posted in Puzzles, checkered fillomino, hard